4WE6G62/EW230N9K4力士乐电磁阀，上海韦米机电设备有限公司主营销售产品，原厂原装，质量保障，销售热线：13524123009，在线QQ：2896079243，传真：021-51334670；联系人：雷青。热诚欢迎新老客户咨询购买！
电磁阀从原理上分为三大类：
1）直动式电磁阀：
原理：通电时，电磁线圈产生电磁力把关闭件从阀座上提起，阀门打开；断电时，电磁力消失，弹簧把关闭件压在阀座上，阀门关闭。
特点：在真空、负压、零压时能正常工作，但通径一般不超过25mm。
2）分步直动式电磁阀：
原理：它是一种直动和先导式相结合的原理，当入口与出口没有压差时，通电后，电磁力直接把先导小阀和主阀关闭件依次向上提起，阀门打开。当入口与出口达到启动压差时，通电后，电磁力先导小阀，主阀下腔压力上升，上腔压力下降，从而利用压差把主阀向上推开；断电时，先导阀利用弹簧力或介质压力推动关闭件，向下移动，使阀门关闭。
特点：在零压差或真空、高压时亦能可*动作，但功率较大，要求必须水平安装。
3）先导式电磁阀：
原理：通电时，电磁力把先导孔打开，上腔室压力迅速下降，在关 闭件周围形成上低下高的压差，流体压力推动关闭件向上移动，阀门打开；断电时，弹簧力把先导孔关闭，入口压力通过旁通孔迅速腔室在关阀件周围形成下低上高的压差，流体压力推动关闭件向下移动，关闭阀门。
特点：流体压力范围上限较高，可任意安装（需定制）但必须达到流体压差条件。
液压机是一种以液体为工作介质，用来传递能量以实现各种工艺的机器。液压机除用于锻压成形外，也可用于矫正、压装、打包、压块和压板等。液压机包括水压机和油压机。以水基液体为工作介质的称为水压机,以油为工作介质的称为油压机。液压机的规格一般用公称工作力（千牛）或公称吨位（吨）表示。锻造用液压机多是水压机，吨位较高。为减小设备尺寸，大型锻造水压机常用较高压强（35兆帕左右），有时也采用 100兆帕以上的超高压。其他用途的液压机一般采用 6～25兆帕的工作压强。油压机的吨位比水压机低。
基本原理是油泵把液压油输送到集成插装阀块，通过各个单向阀和溢流阀把液压油分配到油缸的上腔或者下腔，在高压油的作用下，使油缸进行运动.液压机是 利用液体来传递压力的设备。液体在密闭的容器中传递压力时是遵循帕斯卡定律。四柱液压机的液压传动系统由动力机构、控制机构、执行机构、辅助机构和工作介质组成。动力机构通常采用油泵作为动力机构，一般为积式油泵。为了满足执行机构运动速度的要求， 选用一个油泵或多个油泵。低压（油压小于2.5MP）用齿轮泵；中压（油压小于6.3MP）用叶片泵；高压（油压小于32.0MP)用柱塞泵。各种可塑性 材料的压力加工和成形，如不锈钢板的挤压、弯曲、拉深及金属零件的冷压成形，同时亦可用于粉末制品、砂轮、胶木、树脂热固性制品的压制。
驱动系统
液压机的驱动系统主要有泵直接驱动和泵-蓄能器驱动两种型式。泵直接驱动，这种驱动系统的泵向液压缸提供高压工作液体，配流阀用来改变供液方向，溢流阀用来调节系统的限定压强，同时起安全溢流作用。这种驱动系统环节少,结构简单,压强能按所需的工作力自动增减，减少了电能消耗，但须由液压机的大工作力和高工作速度来决定泵及其驱动电机的容量。这种型式的驱动系统多用于中小型液压机，也有用泵直接驱动的大型（如120000千牛）自由锻造水压机。
泵－蓄能器驱动 在这种驱动系统中有一个或一组蓄能器。当泵所供给的高压工作液有余量时，由蓄能器储存；而当供给量不足于需要时，便由蓄能器补充供给。采用这种系统可以按高压工作液的平均用量选用泵和电动机的容量，但因为工作液的压强是恒定的，电能消耗量较大，并且系统的环节多，结构比较复杂。这种驱动系统多用于大型液压机，或者用一套驱动系统驱动数台液压机。
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德国力士乐REXROTH电磁阀订货号和型号：
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冲压机是通过电动机驱动飞轮，并通过离合器，传动齿轮带动曲柄连杆机构使滑块上下运动，带动拉伸模具对钢板成型。冲压机也叫冲床，学名为压力机。
冲压机是通过电动机驱动飞轮，并通过离合器，传动齿轮带动曲柄连杆机构使滑块上下运动，带动拉伸模具对钢板成型。所谓的双动就是指压力机有两个滑块，分为内滑块和外滑块，内滑块带动模具的凸模或凹模，外滑块带动模具上的压边圈，在拉伸时压边圈先动作压住钢板边缘，内滑块再动作进行拉伸。
设计原理是将圆周运动转换为直线运动，由主电动机出力，带动飞轮，经离合器带动齿轮、曲轴（或偏心齿轮）、连杆等运转，来达成滑块的直线运动，从主电动机到连杆的运动为圆周运动。
连杆和滑块之间需有圆周运动和直线运动的转接点，其设计上大致有两种机构，一种为球型，一种为销型（圆柱型） ，经由这个机构将圆周运动转换成滑块的直线运动。冲压机对材料施以压力，使其塑性变形，而得到所要求的形状与精度，因此必须配合一组模具（分上模与下模），将材料置于其间，由机器施加压力，使其变形，加工时施加于材料之力所造成之反作用力，由冲压机机械本体所吸收。
力士乐REXROTH液压元件应用行业：注塑机、吹塑机、橡胶和发泡机、陶瓷压机、同步折弯机(折板机),、剪板机(剪床）、冲切/步冲、金属压力机、弯曲/锯床、机床、食品机械、皮革/鞋机、木材/造纸机械、钢铁业/铸造、压铸机/挤压机、电厂、生态能源（风能-水力-太阳能）设备、油和天然气工业设备、混凝土泵、路机、钻井/开采设备、起重机、升降机/叉车、推土机、道路，隧道，水坝工程设备、压缩机、街道维修设备、模拟器/娱乐设备、卡车、铁路工程设备、航空工业设备、船舶/航海工业设备、打谷机/喷洒机、拖拉机/收割机。
